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authorTheodore Ts'o <tytso@mit.edu>2016-12-28 00:22:52 -0500
committerTheodore Ts'o <tytso@mit.edu>2017-01-08 00:58:23 -0500
commit173b8439e1ba362007315868928bf9d26e5cc5a6 (patch)
tree68b5b61d03d14e79a6e93059c15015cd26e09750 /fs/ext4/namei.c
parent5bbdcbbb396196f1c94110ad7a041e90de95c4c2 (diff)
downloadlinux-stericsson-173b8439e1ba362007315868928bf9d26e5cc5a6.tar.gz
ext4: don't allow encrypted operations without keys
While we allow deletes without the key, the following should not be permitted: # cd /vdc/encrypted-dir-without-key # ls -l total 4 -rw-r--r-- 1 root root 0 Dec 27 22:35 6,LKNRJsp209FbXoSvJWzB -rw-r--r-- 1 root root 286 Dec 27 22:35 uRJ5vJh9gE7vcomYMqTAyD # mv uRJ5vJh9gE7vcomYMqTAyD 6,LKNRJsp209FbXoSvJWzB Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/namei.c')
-rw-r--r--fs/ext4/namei.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 80b8afa4a8f9..bb880c326191 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -3527,6 +3527,12 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
EXT4_I(old_dentry->d_inode)->i_projid)))
return -EXDEV;
+ if ((ext4_encrypted_inode(old_dir) &&
+ !fscrypt_has_encryption_key(old_dir)) ||
+ (ext4_encrypted_inode(new_dir) &&
+ !fscrypt_has_encryption_key(new_dir)))
+ return -ENOKEY;
+
retval = dquot_initialize(old.dir);
if (retval)
return retval;
@@ -3727,6 +3733,12 @@ static int ext4_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
int retval;
struct timespec ctime;
+ if ((ext4_encrypted_inode(old_dir) &&
+ !fscrypt_has_encryption_key(old_dir)) ||
+ (ext4_encrypted_inode(new_dir) &&
+ !fscrypt_has_encryption_key(new_dir)))
+ return -ENOKEY;
+
if ((ext4_encrypted_inode(old_dir) ||
ext4_encrypted_inode(new_dir)) &&
(old_dir != new_dir) &&